import pygame

class Ship():
	def __init__(self,screen):
		"""初始化飞船并设置其初始位置"""
		self.screen = screen
		#加载飞船图像并获取其外接矩形
		self.image = pygame.image.load('images/ship.bmp')
		self.rect = self.image.get_rect()
		self.screen_rect = screen.get_rect()
		
		#将每艘新飞船放在屏幕底部中央
		self.rect.centerx = self.screen_rect.centerx
		self.rect.bottom = self.screen_rect.bottom
		
	def blitme(self):
		"""在指定位置绘制飞船"""
		self.screen.blit(self.image, self.rect)

	 
